The gears shown in your recent picture are (I believe) the gears that drive the engine's balance shaft. Nobody messes with those gears.
The only time you would be messing with those two gears is if you were completely disassembling the entire engine (i.e. removing then reinstalling the crankshaft).
There are other timing marks on the engine, up at the camshafts and on the alternator rotor. Those are the ones you should be concerned about.
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